Intravenous Tramadol versus Nalbuphine For Postoperative Pain Control In Cholecystectomy: A Comparative Study. Pakistan Journal of Medical & Cardiological Review, [S. l.], v. 4, n. 4, p. 1933–1939, 2025. Disponível em: http://pakjmcr.com/index.php/1/article/view/391. Acesso em: 16 apr. 2026.